Changes in refraction following laser treatment in a case of traumatic iris cyst

摘要

A 51-year-old male presented with hyperemia and blurring of vision in his left eye. He had had penetrating injury to his left eye by pieces of glass 40 years before. An iris cyst was present occupying the superotemporal quadrant of left anterior chamber. The lens showed posterior subcapsular catarac and was displaced posteriorly by the iris cyst. Because of ocular pain and deteriorating vision, we perforated the cyst wall using a multicolor laser. The iris cyst shrank, ocular pain disappeared, and the vision improved. The left eye had astigmatism of -4.75D before treatment, -7.25D 3 days after treatment, and -2.0D 5 months later. The spherical power was -3.625D before treatment, -6.325D 3 days later and -5.0D 5 months later. The changes in refraction seemed to have been induced by anterior displacement of the lens after collapse of iris cyst followed later by gradual posterior shift of the lens.